.my-tree {
    background-color: #111;

}
.my-tree   .ant-tree-treenode {
    width: 100%;
    position: relative;
}
.my-tree   .ant-tree-treenode .ant-tree-node-content-wrapper{
    flex-grow: 1;
}
.my-tree   .ant-tree-treenode .other-column {
   position: absolute;
   right: 0;
   top: 0;
   width: 80%;
   min-height: 20px;
   background-color: #CCC;
}